Latch and lock combined



(No Model.)

w. A. JUSTICE. LATCH AND L OUK'GOMBIQTED.

No. 505,403. Patented Sept. 19 1893.

Ema/whom:

- 775m. flieif'hmq UNITED STATES PATENT OFFICE.

WILLIAMALBERT JUSTICE, OF NEW ATHENS, ASSIGNOR OF ONE-THIRD TO ELMORE E.JUSTICE, OF BRIDGEPORT, OHIO.

LATCH AND LOCK COMBINED.

SPECIFICATION forming part of- Letters Patent N0.,505,403, datedSeptember 19, 1893.

Application filed April 24, 1893- Serial No. 471,589. (No model.)

To aZZ whom it may concern.-

Be it known thatl, WILLIAM ALBERT J Us- TIOE, a citizenof the UnitedStates, and a'resident of New Athens, Harrison county, State of Ohio,have invented certain new and useand as illustrated on the accompanyingsheet a of drawings, wherein- Figure l is an inside elevation of myimproved latch and lock showing the parts in position with the latchretracted by the turning of the knob-spindle. Fig. 2 is a similarelevation showing the latch in its normal position to latch the door andillustrating how the weight is canted on its pivot by the raising of thetumbler as the bolt is shot. Fig. 3 is a perspective detail of theY-shaped lever to which the Weight is pivoted and by which it issupported.

In certain devices of this character heretofore constructed the latchhas been thrown forward into its latching position through theinst-rumentality of a weight and suitable connections. I employ thisgeneral arrangement and in addition I form an extension at the rear endof the bolt-tumbler which engages a cavity in the weight so that thelatter holds the tumbler in engagement with the bolt to prevent amovement thereof. In the preferred construction of my device I pivotallyconnect the weight with one arm of a bellcrank lever whose other arm isconnected with the latch, and I so arrange the extension of the tumblerthat when the latter is elevated it swings the weight on its pivotrather than raising it bodily, and hence I may employ a heavier weightto shoot the latch than would be possible if the entire weight wereraised by the tumbler-when the keyhas turned.

In the said drawings, the letter B designates the bolt moving insuitable guides and .havinga stud S adapted to be engaged against 5 5.either side of a dog D carried by the tumbler 'l, which latter ispivoted as at t to the base plate Pof the lock as is usual. L is thelatch .havinga beveled face and moving in suitable guides, and K,.is theknob-spindle which passes through a double arm A such as usuallyoperates within a yoke connected to the latch for the purpose ofretracting the latter as the knob-spindle is turned in either direction.All these parts are of the usual or of any well known construction,though preferably shaped about as shown in the drawings, and theiroperation will be understood by all persons familiar with the art.

Coming now to the present invention, the letter Y designates a Y-shapedbell-crank lever pivoted at y to the base plate P above the double armA, and with one of its arms passing closely over the rear of said doublearm and pivotally connected at itsextremity as corner of a weight Wwhich is arranged to rise and fall within the lock-casing forward of apin 19 or other suitable guide therein, and which weight is so shapedthat when it is raised it will fit closely within the lever Y.

At the rear end of the tumbler T is an arm or extension E which passesover and may normally rest upon the knob-spindle, whose body thencepasses loosely through a large notch Y in the lower arm of the lever Y,and

whose extremity e extends into a cavity Ogo formed in the front edge ofthe weight W. The parts are of suitable sizes, shapes, and materials,and considerable change in the exact construction and arrangement may bemade without departing from the principle of my invention.

In operation, the Weight normally draws down the upper arm of the leverY and throws the lower arm forward so as to shoot the latch L, but whenthe knob-spindle is turned in too I either direction the double arm Abears said lower arm of the lever Y to the rear and with it thelatch-the weight rising about vertically and sliding against the pin 10.When the hand is removed from the knob, the weight descends and againshoots the latch.

In the operation of moving the bolt B, the key is inserted in thekeyhole H and turned. It first raises the tumbler and its dog, thenmoves the bolt so that its stud passes under the dog to the oppositeside thereof, and then again lowers the tumbler so that the dog fallsover the stud and holds it against return to its first position. As thekey thus raises the tumbler of my improved lock, the extremity e of theextension E is caused to rise around the pivot t, and hence. it will beclear that the weight W will be swung on its pivot 20 in the lever Y asshown in Fig. 2. It will be clear that if the pivot between the upperarm of the lever Y and the weight were at the center of the upper end ofthe latter, the extension of the tumbler would raise the weight entire;and if the Weight were sufficiently heavy to shoot the latch with asmuch force as is desired, it would then be almost impossible to raisethe tumbler by turning the key at the point shown. Moreover, the raisingof the tumbler would then cause the unlatching of the door which is notalways desirable, whereas by the construction shown and described theraising of the tumbler merely brings the weight temporarily forward anddoes not retract the latch at all.

What is claimed as new is- 1. In a latch, the combination with aknobspindle and a double arm thereon; of a bell crank lever pivoted atits angle to the latchcasing above the knob-spindle with one arm passingdown in rear of said double arm, a latch loosely connected with thelower extremity of this arm, the other arm of said lever extending tothe rear, a weight pivoted at its upper rear corner to the rear end ofthe latter arm, and a guide within the latch-casing against which therear edge of said weight slides, substantially as described.

2. The combination with a latch, a weight,

a lever pivotally connecting them so as to normally shoot the latch, aknob-spindle, and a double arm thereon engaging said lever forretracting the latch; of a bolt, a tumbler therefor, and an extension onthe tumbler engaging a cavity in and normally depressed by said weight,as and for the purpose set forth.

3. In a combined latch and lock, aknobspindle having a double arm, aY-shaped lever pivoted at its angle above said spindle with one armstanding in rear of said double arm, a latch pivoted to the extremity ofthis arm, the other arm of the lever extending about horizontally to therear, and a weight pivotally connected therewith and having a cavity inits front edge; combined with a bolt, a tumbler therefor pivoted at itsfront end to the lock'casing, and an extension at the rear end of thetumbler entering said cavity and normally depressed by the weight, asand for the purpose set forth.

4. In a combined lock and latch, a knobspindle having an arm, a Y-shapedlever pivoted at its angle above said spindle with one arm extending tothe rear and the other arm having a vertical notch and engaged by saidarm on the knob-spindle, a latch pivotally connected with thelast-mentioned arm of the lever, a Weight pivoted at its upper rearcorner to the first-mentioned arm of the lever and having a cavity inits front edge, and a guide in the lock-casing against which the rearedge of the weight slides; combined with a bolt, a tumbler thereforpivoted at its front end to the lock-casing, and a rigid extension atthe rear end of the tumbler passing over the knob-spindle, through saidnotch, and into said cavity in the weight, as and for the purposehereinbefore set forth.

In testimony whereof I have hereunto subscribed my signature on this the20th day of April, A. D. 1893.

WILLIAM ALBERT JUSTICE.

Witnesses:

CHARLES B. DAWSON, CHARLIE (loses.

